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<h1><a name="C41"></a>Chapter 41: <a name="i0"></a>Palisade</h1>
<p>
You're given a grid of squares, some of which contain numbers. Your goal is to subdivide the grid into contiguous regions, all of the same (given) size, such that each square containing a number is adjacent to exactly that many edges (including those between the inside and the outside of the grid).
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<p>
Credit for this puzzle goes to <a name="i1"></a>Nikoli, who call it &#8216;Five Cells&#8217;. <a href="#p0">[22]</a>.
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<p>
Palisade was contributed to this collection by Jonas K&#246;lker.
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<p><a name="p0"></a>
[22] <a href="https://www.nikoli.co.jp/en/puzzles/five_cells/"><code>https://www.nikoli.co.jp/en/puzzles/five_cells/</code></a>
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<h2><a name="S41.1"></a>41.1 <a name="i2"></a>Palisade controls</h2>
<p>
Left-click to place an edge. Right-click to indicate &#8216;no edge&#8217;. Alternatively, the arrow keys will move a keyboard cursor. Holding Control while pressing an arrow key will place an edge. Press Shift-arrowkey to switch off an edge. Repeat an action to perform its inverse.
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<p>
(All the actions described in <a href="common.html#S2.1">section 2.1</a> are also available.)
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<h2><a name="S41.2"></a>41.2 <a name="i3"></a>Palisade parameters</h2>
<p>
These parameters are available from the &#8216;Custom...&#8217; option on the &#8216;Type&#8217; menu.
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<dl><dt>
<em>Width</em>, <em>Height</em>
</dt>
<dd>
Size of grid in squares.
</dd>
<dt>
<em>Region size</em>
</dt>
<dd>
The size of the regions into which the grid must be subdivided.
</dd>
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